Headstock brake



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W. E. INGHAM HEADSTOCK BRAKE Filedl June 10 'III Patented Het. ld, i934.

WALTER E. INGHAM, OI NEWXNGTON, CONNECTICUT, .ASSIGNOR TO :PRATT & `WH'J'I- NEY COMPANY, OF NEW YORK, N. Y., A. CORPORATION OF NEVJv JERSEY.

HEADSTOGK BRAKE.

Application filed .Tune 10,

To all whom t may concern.'

Be it lrnown that I, WALTER E. INGHAM, a citizen of the United States, residing at Newington, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Headstock Brakes, of which the following is a specification.

This invention relates to brake mechanisms and particularly to such mechanism as applied to the headstock of a lathe or like machine.

It is the principal object of the invention to provide an improved brake for this purpose which will be simple in form, con-- venient to operate and occupy a minimum of space on the machine.

lt is an object of the invention to provide a brake, the brake shoe portion of which is located within the frame of the machine` and the operating portion placed in a position most convenient to the operator.

With these and other objects in view, my invention consists in the features of con- 1 struction and operation set forth in the following specification and illustrated in the accompanying drawing. ln such drawing annexed hereto and forming a part of this specification, I have shown my invention embodied in a lathe headstock but it will be understood that the invention can beotherwise embodied and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

Referring to the figures of the drawings:

Figure 1 is a fragmentary plan view of a lathe headstock showing the invention einbodied therein.

Fig. 2 is a fragmentary side elevation of the saine, a portion thereof being shown in section.

A. lathe operator, when desiring to stop the rotation of the headstock spindle, quite commonly places his hand flat on the cone pulley thereof. The resent invention provides a mechanical rake so formed and located on the headstock that the operator may, by this same habitual movement of his hand, apply the brake to stop the rotation of the spindle. The invention furthermore provides that the greater portion of the brake shall be located within the headstock fra-ine or casing, the exterior portion thereof 192i. serial No. 476,522.

being in the forni of a hand plate lying close to ,the headstock frame and adapted to receive the hand of the operator to apply the brake in the same manner that he would ordinarily place his hand on the pulley. The brake is preferably pivoted to the headstock frame and may be constructed as illustrated in the drawing and hereinafter described.

In the drawing, I have illustrated aheadstock comprising a frame or casing 1 within which is rotatably mounted a spindle 2 provided with a face plate 3 and a center 4f. The means for driving the spindle is illustrated as comprising a cone pulley 5.

The brake comprising the invention is in the form of a lever 6 pivoted intermediate its ends at 7 on the frame or casing 1. @ne end of the lever extends downwardly at 8 through an opening 9 in the casing and laterally at 10. rlhe portion 10 extends beneath the pulley 5 and is provided with a brake shoe 11 for engaging the pulley. The other end of the lever is preferably in the forni of a plate 12 and extends over the casing as illustrated. This plate 12 may be mountedin a substantially horizontal position and is preferably curved to the contour of the casing. The normal position of the brake is illustrated in Fig. 2 being held in suoli position by means of a screw 13 and a spring 141.

It will be noted that the brake, except for the operating plate 12 thereof, lies entirely within the headstock and therefore provides a brake without the usual unsightly and objectionable projecting portions incident to such mechanisms. While the brake is illustrated as being located at the top of the headstock, it should be understoodthat the location of the saine in any desired position on the casing 1 is within the scope of the invention.

hat l claim is:

1. A headstock brake comprising the cornbination of a headstock, a spindle rotatable therein, a member mounted on the spindle, an element pivoted on the headstock at a point adjacent the junction of two rela-- tively angular portions of the element, the outer of such two portions extending over the headstock adjacent the outer surface thereof and the inner portion extending through an opening into the headstock, and a brake shoe on the inner portion adapted to frictionally engage the saidiinelnher j when pressure radially inward; or the spindle is applied to the saidouter portion.

2. vA heads'tock brake comprising the combination cfa headst'ocl'r, a spindle rotatable therein, a memberv mounted on the spindle, an element pivoted on thevheadstoclr at a fie point adjacent the junction of two relatively vangular portions of thel element, the outer of Such two portions extending over the f gheadstoclr adjacent'fthe outerv surface there j disengaged position.

of and the,l inner pertionextending through an opening intoV the headstoch, a brake shoe on the inner' pertien-.adapted to frictionally engage the said ,memberl when pressure ra,-

v anelernent pivotedon the, headstoclrv at a headstoelr. and beingl aplate shapedV sub# l stantie'illy to. the cong'ura-tion of the adjalpoint!adjacent the junction l two relatively angulark portions oi" the element,r the outer of such twof portions yexteaiding overthe cent extern-ral surfacey of theheadstocl, the inner portionzlextendin-g. froml the pivot threugh an opening into the headstock, and

a brake ysla-oe. en thelininer portion adapted to frictionally engage. the said member when pressure radial-ly inward of the spindle is appliedL te the said outer portion.v

Ll. A headsteck brake comp-risingtlieeum- 'binatioi-i. of av headstoek,.y ahorizontal spindleyro-tatab-le therein, a member mounted on the spindle, anelem'ent pivoted en the head-` stock transversely o-f the spindle at a point adjacent the j-,unctiongof two' relatively angular portions of the element, the saidpivet being horizon-tal and at the top,- efthe headn steek, the outer ef such two; portionsI being plate-like in form and extending horizontally over the headstock and the'inner portion extending through an opening into the headstock, 'and a brake shoey on the inner vportion adapted t0 frictionally engage the therewith, a double L-shaped element comv prising three relatively angular portions, the element bei-ng pivoted on the headstock ata point adjacent the junction of two of the said portions, the cuter of such two portiensextending over the headstock and the intermediate portion extending thi-ou h an opening into the headstock, and a rake shee on the third portion adapted to friction-ally engage the said inner surface when pressure radially inward of the spindle is applied to the said outer portion.

6. A lieadstock brake comprising the com-- binat--on of a headstock, a horizontal spindle rotatable therein, a pulley on the spindle for driving the same, the pulley having an inner surface concentric with. the spindle, an element mounted on a horizontal pivot at the topv of the headstock and extending horizontally thereover, a brake shoe adjacent the said inner surface of the pulley, and an operative connection from. the ele- -m-ent to the brake shoe whereby downward pressure on the element will frictionally engage the shoe with the said surface.

In' testimony whereof, I hereto aflix my signature. r WALTER E. INGHAM. 

